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mm/hmm: make HMM_MIRROR an implicit option

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Make HMM_MIRROR an option that is selected by drivers wanting to use it
instead of a user visible option as it is just a low-level implementation
detail.

Link: https://lore.kernel.org/r/20190806160554.14046-15-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Christoph Hellwig 2019-08-06 19:05:52 +03:00 committed by Jason Gunthorpe
parent f442c283ef
commit 9c240a7bb3
3 changed files with 12 additions and 10 deletions
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4
drivers/gpu/drm/amd/amdgpu/Kconfig
View File

@ -27,7 +27,9 @@ config DRM_AMDGPU_CIK
config DRM_AMDGPU_USERPTR
bool "Always enable userptr write support"
depends on DRM_AMDGPU
depends on HMM_MIRROR
depends on MMU
select HMM_MIRROR
select MMU_NOTIFIER
help
This option selects CONFIG_HMM and CONFIG_HMM_MIRROR if it
isn't already selected to enabled full userptr support.

4
drivers/gpu/drm/nouveau/Kconfig
View File

@ -86,9 +86,11 @@ config DRM_NOUVEAU_SVM
bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
depends on DEVICE_PRIVATE
depends on DRM_NOUVEAU
depends on HMM_MIRROR
depends on MMU
depends on STAGING
select HMM_MIRROR
select MIGRATE_VMA_HELPER
select MMU_NOTIFIER
default n
help
Say Y here if you want to enable experimental support for

14
mm/Kconfig
View File

@ -675,16 +675,14 @@ config MIGRATE_VMA_HELPER
config DEV_PAGEMAP_OPS
bool
#
# Helpers to mirror range of the CPU page tables of a process into device page
# tables.
#
config HMM_MIRROR
bool "HMM mirror CPU page table into a device page table"
bool
depends on MMU
select MMU_NOTIFIER
help
Select HMM_MIRROR if you want to mirror range of the CPU page table of a
process into a device page table. Here, mirror means "keep synchronized".
Prerequisites: the device must provide the ability to write-protect its
page tables (at PAGE_SIZE granularity), and must be able to recover from
the resulting potential page faults.
depends on MMU_NOTIFIER
config DEVICE_PRIVATE
bool "Unaddressable device memory (GPU memory, ...)"